Optimum cycle control of a two-stage injection heat pump with a double expansion sub-cooler

Jaehyeok Heo, Hoon Kang, Yong Chan Kim

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The refrigerant injection technique has rapidly developed in recent years due to its outstanding performance at low ambient temperatures, and various control methods for a heat pump with injection have been presented. However, most studies on cycle control have been theoretical, and practical control methods for cycle optimization based on experimental results hardly have been presented. In this study, an optimum cycle control method was proposed for a refrigerant injection heat pump with a double expansion sub-cooler based on the intermediate pressure and the injection ratio. The optimum sub-cooler pressure ratio was proposed from 0.4 to 0.7 in view of the heating capacity, and from 0.7 to 0.8 in view of the COP. The optimum injection ratio increased from 0.1 to 0.3 with an increase in the compression ratio.

Original languageEnglish
Pages (from-to)58-67
Number of pages10
JournalInternational Journal of Refrigeration
Volume35
Issue number1
DOIs
Publication statusPublished - 2012 Jan 1

Fingerprint

Pumps
Refrigerants
Heating
Hot Temperature
Temperature

Keywords

  • Control
  • Heat pump
  • Injection
  • Optimization
  • Two-stage

ASJC Scopus subject areas

  • Mechanical Engineering
  • Building and Construction

Cite this

Optimum cycle control of a two-stage injection heat pump with a double expansion sub-cooler. / Heo, Jaehyeok; Kang, Hoon; Kim, Yong Chan.

In: International Journal of Refrigeration, Vol. 35, No. 1, 01.01.2012, p. 58-67.

Research output: Contribution to journalArticle

@article{e8a6336585ee4dd7b2030245716ccd02,
title = "Optimum cycle control of a two-stage injection heat pump with a double expansion sub-cooler",
abstract = "The refrigerant injection technique has rapidly developed in recent years due to its outstanding performance at low ambient temperatures, and various control methods for a heat pump with injection have been presented. However, most studies on cycle control have been theoretical, and practical control methods for cycle optimization based on experimental results hardly have been presented. In this study, an optimum cycle control method was proposed for a refrigerant injection heat pump with a double expansion sub-cooler based on the intermediate pressure and the injection ratio. The optimum sub-cooler pressure ratio was proposed from 0.4 to 0.7 in view of the heating capacity, and from 0.7 to 0.8 in view of the COP. The optimum injection ratio increased from 0.1 to 0.3 with an increase in the compression ratio.",
keywords = "Control, Heat pump, Injection, Optimization, Two-stage",
author = "Jaehyeok Heo and Hoon Kang and Kim, {Yong Chan}",
year = "2012",
month = "1",
day = "1",
doi = "10.1016/j.ijrefrig.2011.09.005",
language = "English",
volume = "35",
pages = "58--67",
journal = "International Journal of Refrigeration",
issn = "0140-7007",
publisher = "Elsevier Limited",
number = "1",

}

TY - JOUR

T1 - Optimum cycle control of a two-stage injection heat pump with a double expansion sub-cooler

AU - Heo, Jaehyeok

AU - Kang, Hoon

AU - Kim, Yong Chan

PY - 2012/1/1

Y1 - 2012/1/1

N2 - The refrigerant injection technique has rapidly developed in recent years due to its outstanding performance at low ambient temperatures, and various control methods for a heat pump with injection have been presented. However, most studies on cycle control have been theoretical, and practical control methods for cycle optimization based on experimental results hardly have been presented. In this study, an optimum cycle control method was proposed for a refrigerant injection heat pump with a double expansion sub-cooler based on the intermediate pressure and the injection ratio. The optimum sub-cooler pressure ratio was proposed from 0.4 to 0.7 in view of the heating capacity, and from 0.7 to 0.8 in view of the COP. The optimum injection ratio increased from 0.1 to 0.3 with an increase in the compression ratio.

AB - The refrigerant injection technique has rapidly developed in recent years due to its outstanding performance at low ambient temperatures, and various control methods for a heat pump with injection have been presented. However, most studies on cycle control have been theoretical, and practical control methods for cycle optimization based on experimental results hardly have been presented. In this study, an optimum cycle control method was proposed for a refrigerant injection heat pump with a double expansion sub-cooler based on the intermediate pressure and the injection ratio. The optimum sub-cooler pressure ratio was proposed from 0.4 to 0.7 in view of the heating capacity, and from 0.7 to 0.8 in view of the COP. The optimum injection ratio increased from 0.1 to 0.3 with an increase in the compression ratio.

KW - Control

KW - Heat pump

KW - Injection

KW - Optimization

KW - Two-stage

UR - http://www.scopus.com/inward/record.url?scp=82955212925&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=82955212925&partnerID=8YFLogxK

U2 - 10.1016/j.ijrefrig.2011.09.005

DO - 10.1016/j.ijrefrig.2011.09.005

M3 - Article

AN - SCOPUS:82955212925

VL - 35

SP - 58

EP - 67

JO - International Journal of Refrigeration

JF - International Journal of Refrigeration

SN - 0140-7007

IS - 1

ER -